#include <iostream>
using namespace std;
#include <stdio.h>
#define OTL_ORA8I // Compile OTL 4.0/OCI8i
#define OTL_UNICODE // Enable Unicode OTL for OCI8i
#include <otlv4.h> // include the OTL 4.0 header file
otl_connect db; // connect object
void insert()
// insert rows into table
{
otl_stream o(50, // buffer size
"insert into test_tab values(:f1<float>,:f2<char[31]>)",
// SQL statement
db // connect object
);
char tmp[32];
unsigned short tmp2[32]; // Null terminated Unicode character array.
for(int i=1;i<=100;++i){
sprintf(tmp,"Name%d",i);
unsigned short* c2=tmp2;
char* c1=tmp;
// Unicode's first 128 characters are ASCII (0..127), so
// all is needed for converting ASCII into Unicode is as follows:
while(*c1){
*c2=(unsigned char)*c1;
++c1; ++c2;
}
*c2=0; // target Unicode string is null terminated,
// only the null terminator is a two-byte character,
// not one-byte
o<<(float)i;
o<<(unsigned char*)tmp2;
// overloaded operator<<(const unsigned char*) in the case of Unicode
// OTL accepts a pointer to a Unicode character array.
// operator<<(const unsigned short*) wasn't overloaded
// in order to avoid ambiguity in C++ type casting.
}
}
void select()
{
otl_stream i(1, // buffer size
"begin "
" open :cur<refcur,out[50]> for "
// :cur is a bind variable name, refcur -- its type,
// out -- output parameter, 50 -- the buffer size when this
// reference cursor will be attached to otl_refcur_stream
" select * "
" from test_tab "
" where f1>=:f<int,in> and f1<=:f*2; "
"end;", // PL/SQL block returns a referenced cursor
db // connect object
);
// create select stream with referenced cursor
i.set_commit(0); // set stream "auto-commit" to OFF.
float f1;
unsigned short f2[32];
otl_refcur_stream s; // reference cursor stream for reading rows.
i<<8; // assigning :f = 8
i>>s; // initializing the refrence cursor stream with the output
// reference cursor.
while(!s.eof()){ // while not end-of-data
s>>f1;
s>>(unsigned char*)f2;
// overloaded operator>>(unsigned char*) in the case of Unicode
// OTL accepts a pointer to a Unicode chracter array.
// operator>>(unsigned short*) wasn't overloaded
// in order to avoid ambiguity in C++ type casting.
cout<<"f1="<<f1<<", f2=";
// Unicode's first 128 characters are ASCII, so in order
// to convert Unicode back to ASCII all is needed is
// as follows:
for(int j=0;f2[j]!=0;++j){
cout<<(char)f2[j];
}
cout<<endl;
}
s.close(); // closing the reference cursor
i<<4; // assigning :f = 4
i>>s;
while(!s.eof()){ // while not end-of-data
s>>f1;
s>>(unsigned char*)f2;
// overloaded operator>>(unsigned char*) in the case of Unicode
// OTL accepts a pointer to a Unicode chracter array.
// operator>>(unsigned short*) wasn't overloaded
// in order to avoid ambiguity in C++ type casting.
cout<<"f1="<<f1<<", f2=";
// Unicode's first 128 characters are ASCII, so in order
// to convert Unicode back to ASCII all is needed is
// as follows:
for(int j=0;f2[j]!=0;++j){
cout<<(char)f2[j];
}
cout<<endl;
}
// there is no need to explicitly calls s.close() since s's destructor
// will take care of closing the stream
}
int main()
{
otl_connect::otl_initialize(); // initialize OCI environment
try{
db.rlogon("scott/tiger"); // connect to Oracle
otl_cursor::direct_exec
(
db,
"drop table test_tab",
otl_exception::disabled // disable OTL exceptions
); // drop table
otl_cursor::direct_exec
(
db,
"create table test_tab(f1 number, f2 nvarchar2(60))"
); // create table
db.set_character_set(SQLCS_NCHAR);
insert(); // insert records into table
select(); // select records from table
}
catch(otl_exception& p){ // intercept OTL exceptions
cerr<<p.msg<<endl; // print out error message
cerr<<p.stm_text<<endl; // print out SQL that caused the error
cerr<<p.var_info<<endl; // print out the variable that caused the error
}
db.logoff(); // disconnect from Oracle
return 0;
}
f1=8, f2=Name8
f1=9, f2=Name9
f1=10, f2=Name10
f1=11, f2=Name11
f1=12, f2=Name12
f1=13, f2=Name13
f1=14, f2=Name14
f1=15, f2=Name15
f1=16, f2=Name16
f1=4, f2=Name4
f1=5, f2=Name5
f1=6, f2=Name6
f1=7, f2=Name7
f1=8, f2=Name8
Copyright © 1996, 2007, Sergei Kuchin, email: skuchin@ispwest.com, skuchin@gmail.com .
Permission to use, copy, modify and redistribute this document for any purpose is hereby granted without fee, provided that the above copyright notice appear in all copies.